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Period 4 element
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===Manganese=== [[File:Manganese electrolytic and 1cm3 cube.jpg|frameless|left|upright=0.3]] [[Manganese]] (Mn) is an element in [[group 7 element|group 7]]. Manganese is often found in combination with iron. Manganese, like chromium before it, is an important component in [[stainless steel]], preventing the iron from rusting. Manganese is also often used in pigments, again like chromium. Manganese is also poisonous; if enough is inhaled, it can cause irreversible neurological damage.
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